Monthly Archives: April 2018

OTN Ep #007: ASASSN-18ix, A New Millisecond Radio Pulsar from FAST, and MAXI J1820+070



In this podcast, we share three reports of recent discoveries.  The first is of an optical transient source, ASASSN-18ix. The discovery report suggests the transient is a classical nova- but it can also be a cataclysmic variable; they’re not sure which.  The second report is the first reported discovery of a millisecond pulsar, by a new radio facility in China called “FAST”. FAST is now the largest astronomical radio dish in the world, and it is only  just beginning to operate. The first discovery is of a millisecond pulsar which, the report suggests, is so faint, it could not have possibly been detected by the existing, less sensitive telescopes. And finally, we share a report of new behavior from the black hole candidate, MAXI J1820+070.     

After the show, we invite you to examine the results even further at our website; and join the discussion online at Twitter using #OutThereNow.

In this podcast:

  • ATEL 11561  ASAS-SN Discovery of a Possible Galactic Nova ASASSN-18ix
  • ATEL 11574  Optical/X-ray Flux Decoupling in MAXI J1820+070
  • ATEL 11584  FAST’s Discovery of a New Millisecond Pulsar (MSP) toward the Fermi-LAT unassociated source 3FGL J0318.1+0252

From neutron stars, to black holes, to tidal disruption events, to gravitational wave sources, to neutrinos, to cosmic rays: Out There Now shares the latest, most eye-catching astronomy and astrophysics research results with you.

Special thanks to K. Z Stanek, Pei Wang, Amanda Townsendand Mona Eltahawy.


OTN Ep #006: 3C 279 is active



In this podcast, 3C 279 is active. “3C” refers to the “3rd Cambridge Catalogue of Radio Source”, and “279” is this object’s number in that catalog, which was published way back in 1959, when radio astronomical observations were just a toddler. And though we’ve known about this object for decades, it has been observed to get bright, and then fade again — what we call, “an active state”.   This month, 3C 279 has been detected as “active” in three wildly ranging photon energy bands: in the gamma-rays, where it was first detected using the FERMI-LAT observatory, which is a satellite in low-earth orbit; in the Very High Energy range, using the MAGIC telescopes in the Canary Islands;  and in the radio wavelength band, using ALMA on the Atacama Plain, in Chile. With observations like these, astrophysicists are piecing together how high energy particles, magnetic fields, photons, and gravity, all work together, to produce emission bright enough to be seen, half a universe away.

After the show, we invite you to examine the results even further at our website; and join the discussion online at Twitter using #OutThereNow.

In this podcast:

  • ATel 11542  Fermi LAT detection of renewed strong GeV activity from the FSRQ 3C 279
  • ATel 11545 MAGIC detection of increased activity from FSRQ 3C 279 at very-high-energy gamma rays
  • ATel 11572  3C 279: ALMA detection of radio flare in total and polarized flux densities.

From neutron stars, to black holes, to tidal disruption events, to gravitational wave sources, to neutrinos, to cosmic rays: Out There Now shares the latest, most eye-catching astronomy and astrophysics research results with you.

Special thanks to Herve Eulacia, Matthieu Guyonnet-Duluc, Seiji Komeno, Razmik Mirzoyan, Roopesh Ojha, and Mona Eltahawy.


OTN Ep #005: The Bit Character Returns: MAXI J1820+070



On today’s podcast, we bring back a past bit character.   You know what this is, don’t you?  When a show suddenly – around episode 5 or so –  turns around, and focuses in on what you thought was a bit character introduced back in episode 2 for five minutes? Somebody you could forget, because you’ll never see them again?  Somebody who didn’t matter to the main plotline to the show.   We intend to do this a lot on this podcast, to return to an object you may have heard about, then forgotten.

So here, we do just that: we return to something which you thought might be a bit character.  We share 3 reports — the entire show — on one specific object which made a short appearance in a previous show: MAXI J1820+070.  Observations are taken with the Very Large Telescope in the Atacama Plain of Chile; near Abu Dhabi in the United Arab Emirates; in Russia,with the RATAN 600m radio telescope; and in New Mexico, with The Jansky Very Large Array (VLA) Low-band Ionosphere and Transient Experiment (VLITE) in the radio band.

After the show, we invite you to examine the results even further at our website; and join the discussion online at Twitter using #OutThereNow.

In this podcast:

  • ATel 11533, A bright mid-infrared excess in MAXI J1820+070
  • ATel 11539, The 30-day monitoring of MAXI J1820+070 at 4.7 GHz
  • ATel 11540, VLITE meter-wavelength detection of MAXI J1820+070 at 339 MHz

From neutron stars, to black holes, to tidal disruption events, to gravitational wave sources, to neutrinos, to cosmic rays: Out There Now shares the latest, most eye-catching astronomy and astrophysics research results with you.


OTN Ep #004: Two Pairs



In this podcast, we share two pairs of reports.  In each pair, the topic is somewhat the same – reflected in the title.  But to the astronomer’s way of thinking, the objects are enormously different.  First, we look at a pair of “X-ray re-brightenings”, one of a B-type emission star, another of an accreting millisecond X-ray pulsar.  And then we look at two spectroscopic classifications of supernovae — one of SN 2018aql as a yount type IIP supernova, the other of SN2018aqm as a type Ia Supernova.

After the show, we invite you to examine the results even further at our website, and join the discussion online at Twitter using #OutThereNow.

In this podcast:

  • ATel #11517 X-ray rebrightening of the Be/X-ray transient Swift J0243.6+6124
  • ATel #11520 X-ray rebrightening of the accreting millisecond X-ray pulsar IGR J17379-3747
  • ATel #11525  Spectroscopic Classification of SN 2018aql as a young type IIP supernova
  • ATel #11531  Spectroscopic Classification of SN 2018aqm as A Type Ia Supernova

 

From neutron stars, to black holes, to tidal disruption events, to gravitational wave sources, to neutrinos, to cosmic rays: Out There Now shares the latest, most eye-catching astronomy and astrophysics research results with you.


OTN Ep #003: Why Swift J1756.9-2508?



We share reports on one specific object: Swift J1756.9-2508, an accreting, millisecond X-ray pulsar.  It was discovered in June 2007- suddenly bright, as transient sources can be; the 182 Hz X-ray pulsation was quickly discovered, but a month later, the object faded and disappeared from the sky —  and has been dormant since July 2007. Until just last week, when it suddenly turned on again. Hear about four different observations of SWIFT J1756.9-2508, here.

And then we ask the question: why are we even talking about this?

After the show, we invite you to examine the results even further at our website, and join the discussion online at Twitter using #OutThereNow.

In this podcast:

    • ATel #11497New X-ray outburst of accreting millisecond pulsar SWIFT J1756.9-2508 detected by INTEGRAL
    • ATel #11502. NICER Detects Pulsations from Swift J1756.9-2508
    • ATel #11505. Swift/BAT confirms the outburst of Swift J1756.9-2508
    • ATel #11523. INTEGRAL observation of SWIFT J1756.9-2508 in outburst

 

From neutron stars, to black holes, to tidal disruption events, to gravitational wave sources, to neutrinos, to cosmic rays: Out There Now shares the latest, most eye-catching astronomy and astrophysics research results with you.


OTN Ep #002: SN Ia 2018aoz, MAXI J1820+070 and ASASSN-18gq



We share three new reports — where the supernova SN Ia 2018aoz is Ultra-Violet bright; the optical and X-ray quasiperiodic oscillations in MAXI J1820+070 are of similar frequency, and astrometry and photometry suggests the Nature of ASASSN-18gq. 

After the show, we invite you to examine the results even further at our website, and join the discussion online at Twitter using #OutThereNow.

In this podcast:

  • ATel #11510:  Detection of optical and X-ray QPOs at similar frequencies in MAXI J1820+070
  • ATel #11511: Swift UVOT Observations show SN Ia 2018aoz/DLT18q is UV-bright
  • ATel #11518: On the Progenitor and Nature of ASASSN-18gq

From neutron stars, to black holes, to tidal disruption events, to gravitational wave sources, to neutrinos, to cosmic rays: Out There Now shares the latest, most eye-catching astronomy and astrophysics research results with you.


OTN Ep #001: ASSASN-18fv and the Discovery of Millisecond Pulsations from a Neutron Star Low Mass X-ray Binary



From neutron stars, to black holes, to tidal disruption events, to gravitational wave sources, to neutrinos, to cosmic rays: Out There Now shares the latest, most eye-catching research results with you.

In this episode, we share three new results on the outburst of the newly discovered transient ASSASN-18fv; plus, the X-ray observatory NICER discovers millisecond pulsations from the neutron star IGR J17379-3747.

After the show, we invite you to examine the results even further at our website, and join the discussion online at Twitter using #OutThereNow.

In this podcast:

  • ATel #11504,  Radio Observations of Nova Muscae 2018 and Nova Carinae 2018 (ASASSN-18fv)
  • ATel #11506,  Near-IR Spectroscopy of ASASSN-18fv
  • ATel #11507, NICER discovers millisecond pulsations from the neutron star LMXB IGR J17379-3747
  • ATel #11508. BRITE nanosatellite serendipitously captures oscillatory rise and fall of ASASSN-18fv